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Shure ULXD2/SM58 is a microphone with AES 256-bit data stream encryption. Included in ULXD2/SM58 is Shure's gain ranging feature, optimizing the unit for the dynamic range of the input signal, eliminating the need for a transmitter gain adjuster. In addition, it has a backlit LCD menu for ease of use. These features, and its rugged metal housing make it a great addition to a professional presentation venue.